Describing Matter Warm-Up What did you include in your response? Check all that apply. Sample Response: The windsurfer, his board, and the air and water around him are all made of matter. All matter is made up of very small particles called atoms, which cannot be divided. The windsurfer, his board, and the air and water around him are all made of matter. O All matter is made up of very small particles called atoms, which cannot be divided. ) Intro Done